Spark-arrester.



G. THOMAS.

SPARK ARRESTER. APPLICATION FILED 11110.10, 1913.

1,1 18,452. Patented Nov. 24, 1914.

,1 7 aL/ Y ///5 J/ 'fi J enone THOMAS, or rnnsnan, GER ANY.

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Specification of Letters Patent.

Patented Nov. 24., 1914..

Application filediAugust 16, 1913. Serial No. 785,168.

To all whom it may concern:

-Be it known that I, GEonG THOMAS, a subect of the. King. of Prussia, German Emperor, residing at Breslau, in the Kingdom.

of Prussia, German Empire have invented certain new and useful Improvements in Spark-Arresters, of which the following is a specification.

The spark arresters arranged in the smoke box of the engine present the inconvenience that they often get clogged by the deposit formed of the solid particles and of the tarry substances separating from the gases of combustion. In order to obviate this inconvenience the spark arrester according to this invention is not fixed to the wall of the smoke box or to the chimney or to the conical head of the steam pipe, but loosely mounted in a frame which is arranged in said smoke box. The spark arrester is thus continuously shaken when the engine works so that a clogging of the spark arrester is effectually prevented.

There have already become known spark arresters with movable baskets but these baskets are not rigid so that the vibrations and shocks from the engine are only incom-.

pletely transferred to the movable parts of said spark arresters.

According to this invention the spark arrester comprises one or morebaskets, which are completely rigid and loosely mounted in a frame so that the shocks are thoroughly transmitted with full strength to the spark arrester so that a clogging of the same is absolutely prevented.

In the accompanying drawings a spark arrester comprising two baskets is shown by way of example.

Figure 1 is a longi and 3 are perspective views.

The spark arrester is mounted as usual between the chimney 2and the conical head 3 of the steam pipe 4 and. it consists of two separate baskets 5 and 6 of the shape of a hollow rigid inverted pyramid, the walls of which are made of fixed and inclined small plates. Upon the outwardly bent flange 2 of the chimney, bars 7 are fixed which carry a rectangular plate 8 carrying by means of vertical bolts 9 lower plate 11 which has at the middle a circular aperture 10. The two plates form the frame for the upper part 5 of the spark arrester. The distance between the two plates 8 and 11 is greater than the height of the spark arrester and the distance tudinal section. Figs. 2

between the vertical bolts 9 is greater than the width of said spark arrcstcr so that the same can freely move in. vertical and lateral directions. The lower part 6 of the spark arrester is situated under the plate 11 and has lateral flaps 12 which engage with U-irons 13 fixed upon a plate 1 1 which is mounted with a central opening upon the flange 15 of the cone-shaped head 3 of the steam pipe and sits loosely upon the flange 16 of said steam pipe 4. The plate 14 has an upwardly inclined part 17 which serves as abutment for the spark arrester if the same moves in the U-shaped rails 13 in the direction of the arrow (Fig. 1). Studs 18 downwardly projecting from the plate 11 serve for limiting the displacement of thespark arrester in the other direction.

The distance between the plates 11 and 14 is greater than the height of the lower part of the spark arrester and the distance bea tween the abutment plate 17 and the studs 18 i is greater than the length of said part 6 of the spark arrester. The two parts 5 and 6 of the spark arrester being loosely mounted 1 in the frames (the frame for the lower spark arrester consists of the parts 16, 17, 18 and i 11) can freely move invertical and lateral directions and jump continuously owing to the vibrations of the engine, whereby the clogging of the apparatus is absolutely prevented. .As the upper part 5 of the spark arrestcr has to do more work than the lower. part 6 it is arranged so that it can also turn around its axis. The spark arrester can be tion a plate securely fixed to the chimney projecting into the smoke box, vertical bolts 7 in said plate, a lower plate fixed to the lower ends of said vertical bolts, an upper rigid spark arrester-baskct loosely mounted upon said lower plate so that it can freely move.

in vertical and in lateral directions, a lower rigid spark arrester-basket having an opening in one side, flaps at the longitudinal sides of said lower rigid spark arrester-basket, a

base plate mounted at a distance below the a distance from said abutment plate which lower plate of the upper spark-arrester-basket is greater than the length of the lower spark which is greater than the height of said arrester-basket substantially as described and lower spark arrester basket, longitudinal shown and for the purpose set forth.

5 rails fixed upon said base plate designed to In witness whereof I have hereunto set 15 receive the flaps of the lower spark arrestermy hand in the presence of two witnesses. basket, an upwardly inclined abutment plate GEORG THOMAS. at one end of the base plate, and studs down- Witnesses: wardly projecting from the lower plate at MosKo FINzI,

10 the side opposite said abutment plate and at ERNST BLERIOT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latenta, Washington, D. O. 

